Kia oxygen sensor is one of the important parts of the exhaust system and usually comes with two of them, which are mounted in front and behind the three-way catalytic converter.The one located at the front is called the front oxygen sensor and the one at the rear is the rear oxygen sensor.

Kia oxygen sensor problems Effects

Kia oxygen sensor in normal condition is dark in color and there is no impurity left on its surface.
If the surface is covered with black or grayish-white deposits, the oxygen sensor is contaminated by engine oil, and the vehicle may be burning oil;
If bright white rust appears on the surface, it indicates that the oxygen sensor is poisoned, mainly due to the filling of leaded gasoline;
If the surface is covered with deposits similar to limescale, it indicates that the vehicle may have an antifreeze leakage problem, i.e., antifreeze leaks into the cylinder and is burned.If there are deposits similar to scale on the surface, it means that the vehicle may have antifreeze internal leakage problem, i.e. antifreeze leaks into the cylinder and is burned.

Kia oxygen sensor problems

The most obvious features of Kia oxygen sensor problems

The most obvious features of a damaged Kia oxygen sensor include increased fuel consumption, erratic idling, and weak acceleration.Since the ECU corrects the fuel injection quantity according to the signal from the front oxygen sensor, if the front oxygen sensor is damaged, it will lead to fluctuations in the air-fuel ratio, and the mixture will be thicker or thinner at times, or continuously too thick or too thin, which will result in unstable idling and a sudden increase in fuel consumption.Usually when solving this kind of fault, replace the front oxygen sensor can be.

Kia Motors Hot Models

2021 Kia Hot Models: K3/Sportage/Telluride
2022 Kia Hot Models: Sportage/Forte/Telluride/Niro
2023 Kia Hot Models: Sportage/K5/Seltos/Niro/Stinger2024 Kia Hot Models: Sportage/K4/Forte/Telluride2025 Kia Auto Hot Models: Sportage/K4/Forte/Telluride2025 Kia Auto Hot Models: Sportage/K4/Forte/TellurideNiro EV/Stinger
2024 Kia Hot Models: Sportage/K4/Forte/Telluride
2025 Kia Hot Models: Sportage

Kia oxygen sensor OE number

Kia oxygen sensor original equipment part numbers (OE numbers) for some models are as follows:
K5: Rear Oxygen Sensor OE number 39210-2E400.
Forte: Downstream Oxygen Sensor OE number 25732 for the 2022 2.0L L4 gasoline DOHC engine for 2010-2013 2.0L and 2.4L Forte models; upstream oxygen sensor OE number 39210-2G100.2.4L Forte models; the upstream oxygen sensor OE number is 39210-2G100.
Telluride: For 2020-2024 Telluride models, the front left oxygen sensor OE number is 392103L110, the front right oxygen sensor OE number is 392103L100, and the rear left oxygen sensor OE number is 392103LNB0.392103LNB0, Rear Left Oxygen Sensor OE No. 392103LNA0.
For more accurate oxygen sensor OE numbers, we recommend checking the official Kia Parts Catalog or consulting with an Authorized Kia Dealer to ensure an exact match.
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